Bannon was appointed chief executive of Trump’s presidential campaign on August 17, 2016

His spot on the NSC had been widely criticised as injecting politics into White House deliberations on sensitive defence, foreign policy and intelligence matters.

Prior to joining President Trump’s administration, Bannon headed Breitbart News, a right-wing website and has previously been accused of supporting a movement of “white nationalists” and “unabashed anti-Semites”.

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The 62-year-old was born into a poor family in Norfolk, Virginia, in 1953.

He has served in the Navy and also started up his own boutique investment bank which specialised in media in 1990.

Bannon was appointed chief executive of Trump’s presidential campaign on August 17, 2016.

The choice was celebrated by former KKK leader David Duke.

Following his stunning election win, Trump hired Bannon to become his chief strategist and senior counsellor in a move which drew in heavy criticism.

Footage appears to show 'Trump in row with Steve Bannon'

Last month, a footage showed a heated discussion between President Trump and Bannon.

Mr Bannon can be seen through an Oval Office window waving his arms around and appearing agitated.

Ivanka Trump, Jared Kushner and Sean Spicer can also be seen in the background.

News.com.au reported White House chief of staff Reince Priebus and press secretary Sean Spicer were also in the explosive meeting.

While it is unclear what the debate was about it comes after CNN reported Mr Trump was “extremely frustrated” with his staff for allowing his address to Congress last week, which was well received, to be overshadowed by the controversy surrounding Attorney General Jeff Sessions’ meetings with the Russian ambassador.

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